To support RDMA capable ethernet device, create an auxiliary device in the ionic Ethernet driver. The RDMA device is modeled as an auxiliary device to the Ethernet device. Reviewed-by: Shannon Nelson Signed-off-by: Abhijit Gangurde --- drivers/net/ethernet/pensando/Kconfig | 1 + drivers/net/ethernet/pensando/ionic/Makefile | 2 +- .../net/ethernet/pensando/ionic/ionic_api.h | 21 ++++ .../net/ethernet/pensando/ionic/ionic_aux.c | 95 +++++++++++++++++++ .../net/ethernet/pensando/ionic/ionic_aux.h | 10 ++ .../ethernet/pensando/ionic/ionic_bus_pci.c | 5 + .../net/ethernet/pensando/ionic/ionic_lif.c | 7 ++ .../net/ethernet/pensando/ionic/ionic_lif.h | 3 + 8 files changed, 143 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/pensando/ionic/ionic_api.h create mode 100644 drivers/net/ethernet/pensando/ionic/ionic_aux.c create mode 100644 drivers/net/ethernet/pensando/ionic/ionic_aux.h diff --git a/drivers/net/ethernet/pensando/Kconfig b/drivers/net/ethernet/pensando/Kconfig index 01fe76786f77..c99758adf3ad 100644 --- a/drivers/net/ethernet/pensando/Kconfig +++ b/drivers/net/ethernet/pensando/Kconfig @@ -24,6 +24,7 @@ config IONIC select NET_DEVLINK select DIMLIB select PAGE_POOL + select AUXILIARY_BUS help This enables the support for the Pensando family of Ethernet adapters. More specific information on this driver can be diff --git a/drivers/net/ethernet/pensando/ionic/Makefile b/drivers/net/ethernet/pensando/ionic/Makefile index 4e7642a2d25f..a598972fef41 100644 --- a/drivers/net/ethernet/pensando/ionic/Makefile +++ b/drivers/net/ethernet/pensando/ionic/Makefile @@ -5,5 +5,5 @@ obj-$(CONFIG_IONIC) := ionic.o ionic-y := ionic_main.o ionic_bus_pci.o ionic_devlink.o ionic_dev.o \ ionic_debugfs.o ionic_lif.o ionic_rx_filter.o ionic_ethtool.o \ - ionic_txrx.o ionic_stats.o ionic_fw.o + ionic_txrx.o ionic_stats.o ionic_fw.o ionic_aux.o ionic-$(CONFIG_PTP_1588_CLOCK) += ionic_phc.o diff --git a/drivers/net/ethernet/pensando/ionic/ionic_api.h b/drivers/net/ethernet/pensando/ionic/ionic_api.h new file mode 100644 index 000000000000..f9fcd1b67b35 --- /dev/null +++ b/drivers/net/ethernet/pensando/ionic/ionic_api.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */ + +#ifndef _IONIC_API_H_ +#define _IONIC_API_H_ + +#include + +/** + * struct ionic_aux_dev - Auxiliary device information + * @lif: Logical interface + * @idx: Index identifier + * @adev: Auxiliary device + */ +struct ionic_aux_dev { + struct ionic_lif *lif; + int idx; + struct auxiliary_device adev; +}; + +#endif /* _IONIC_API_H_ */ diff --git a/drivers/net/ethernet/pensando/ionic/ionic_aux.c b/drivers/net/ethernet/pensando/ionic/ionic_aux.c new file mode 100644 index 000000000000..781218c3feba --- /dev/null +++ b/drivers/net/ethernet/pensando/ionic/ionic_aux.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */ + +#include +#include "ionic.h" +#include "ionic_lif.h" +#include "ionic_aux.h" + +static DEFINE_IDA(aux_ida); + +static void ionic_auxbus_release(struct device *dev) +{ + struct ionic_aux_dev *ionic_adev; + + ionic_adev = container_of(dev, struct ionic_aux_dev, adev.dev); + kfree(ionic_adev); +} + +int ionic_auxbus_register(struct ionic_lif *lif) +{ + struct ionic_aux_dev *ionic_adev; + struct auxiliary_device *aux_dev; + int err, id; + + if (!(le64_to_cpu(lif->ionic->ident.lif.capabilities) & IONIC_LIF_CAP_RDMA)) + return 0; + + ionic_adev = kzalloc(sizeof(*ionic_adev), GFP_KERNEL); + if (!ionic_adev) + return -ENOMEM; + + aux_dev = &ionic_adev->adev; + + id = ida_alloc_range(&aux_ida, 0, INT_MAX, GFP_KERNEL); + if (id < 0) { + dev_err(lif->ionic->dev, "Failed to allocate aux id: %d\n", + id); + err = id; + goto err_adev_free; + } + + aux_dev->id = id; + aux_dev->name = "rdma"; + aux_dev->dev.parent = &lif->ionic->pdev->dev; + aux_dev->dev.release = ionic_auxbus_release; + ionic_adev->lif = lif; + err = auxiliary_device_init(aux_dev); + if (err) { + dev_err(lif->ionic->dev, "Failed to initialize %s aux device: %d\n", + aux_dev->name, err); + goto err_ida_free; + } + + err = auxiliary_device_add(aux_dev); + if (err) { + dev_err(lif->ionic->dev, "Failed to add %s aux device: %d\n", + aux_dev->name, err); + goto err_aux_uninit; + } + + lif->ionic_adev = ionic_adev; + + return 0; + +err_aux_uninit: + auxiliary_device_uninit(aux_dev); +err_ida_free: + ida_free(&aux_ida, id); +err_adev_free: + kfree(ionic_adev); + + return err; +} + +void ionic_auxbus_unregister(struct ionic_lif *lif) +{ + struct auxiliary_device *aux_dev; + int id; + + mutex_lock(&lif->adev_lock); + if (!lif->ionic_adev) + goto out; + + aux_dev = &lif->ionic_adev->adev; + id = aux_dev->id; + + auxiliary_device_delete(aux_dev); + auxiliary_device_uninit(aux_dev); + ida_free(&aux_ida, id); + + lif->ionic_adev = NULL; + +out: + mutex_unlock(&lif->adev_lock); +} diff --git a/drivers/net/ethernet/pensando/ionic/ionic_aux.h b/drivers/net/ethernet/pensando/ionic/ionic_aux.h new file mode 100644 index 000000000000..f5528a9f187d --- /dev/null +++ b/drivers/net/ethernet/pensando/ionic/ionic_aux.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */ + +#ifndef _IONIC_AUX_H_ +#define _IONIC_AUX_H_ + +int ionic_auxbus_register(struct ionic_lif *lif); +void ionic_auxbus_unregister(struct ionic_lif *lif); + +#endif /* _IONIC_AUX_H_ */ diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c index 4c377bdc62c8..bb75044dfb82 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c @@ -9,6 +9,7 @@ #include "ionic.h" #include "ionic_bus.h" #include "ionic_lif.h" +#include "ionic_aux.h" #include "ionic_debugfs.h" /* Supported devices */ @@ -375,6 +376,8 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_deregister_devlink; } + ionic_auxbus_register(ionic->lif); + mod_timer(&ionic->watchdog_timer, round_jiffies(jiffies + ionic->watchdog_period)); ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE); @@ -415,6 +418,7 @@ static void ionic_remove(struct pci_dev *pdev) if (ionic->lif->doorbell_wa) cancel_delayed_work_sync(&ionic->doorbell_check_dwork); + ionic_auxbus_unregister(ionic->lif); ionic_lif_unregister(ionic->lif); ionic_devlink_unregister(ionic); ionic_lif_deinit(ionic->lif); @@ -444,6 +448,7 @@ static void ionic_reset_prepare(struct pci_dev *pdev) timer_delete_sync(&ionic->watchdog_timer); cancel_work_sync(&lif->deferred.work); + ionic_auxbus_unregister(ionic->lif); mutex_lock(&lif->queue_lock); ionic_stop_queues_reconfig(lif); ionic_txrx_free(lif); diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 7707a9e53c43..146659f6862a 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -19,6 +19,7 @@ #include "ionic_bus.h" #include "ionic_dev.h" #include "ionic_lif.h" +#include "ionic_aux.h" #include "ionic_txrx.h" #include "ionic_ethtool.h" #include "ionic_debugfs.h" @@ -3293,6 +3294,7 @@ int ionic_lif_alloc(struct ionic *ionic) mutex_init(&lif->queue_lock); mutex_init(&lif->config_lock); + mutex_init(&lif->adev_lock); spin_lock_init(&lif->adminq_lock); @@ -3349,6 +3351,7 @@ int ionic_lif_alloc(struct ionic *ionic) lif->info = NULL; lif->info_pa = 0; err_out_free_mutex: + mutex_destroy(&lif->adev_lock); mutex_destroy(&lif->config_lock); mutex_destroy(&lif->queue_lock); err_out_free_netdev: @@ -3384,6 +3387,7 @@ static void ionic_lif_handle_fw_down(struct ionic_lif *lif) netif_device_detach(lif->netdev); + ionic_auxbus_unregister(ionic->lif); mutex_lock(&lif->queue_lock); if (test_bit(IONIC_LIF_F_UP, lif->state)) { dev_info(ionic->dev, "Surprise FW stop, stopping queues\n"); @@ -3446,6 +3450,8 @@ int ionic_restart_lif(struct ionic_lif *lif) netif_device_attach(lif->netdev); ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE); + ionic_auxbus_register(ionic->lif); + return 0; err_txrx_free: @@ -3532,6 +3538,7 @@ void ionic_lif_free(struct ionic_lif *lif) mutex_destroy(&lif->config_lock); mutex_destroy(&lif->queue_lock); + mutex_destroy(&lif->adev_lock); /* free netdev & lif */ ionic_debugfs_del_lif(lif); diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h index e01756fb7fdd..43bdd0fb8733 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h @@ -10,6 +10,7 @@ #include #include #include "ionic_rx_filter.h" +#include "ionic_api.h" #define IONIC_ADMINQ_LENGTH 16 /* must be a power of two */ #define IONIC_NOTIFYQ_LENGTH 64 /* must be a power of two */ @@ -225,6 +226,8 @@ struct ionic_lif { dma_addr_t info_pa; u32 info_sz; struct ionic_qtype_info qtype_info[IONIC_QTYPE_MAX]; + struct ionic_aux_dev *ionic_adev; + struct mutex adev_lock; /* lock for aux_dev actions */ u8 rss_hash_key[IONIC_RSS_HASH_KEY_SIZE]; u8 *rss_ind_tbl; -- 2.43.0